Run details:
Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.61 Safari/537.36
Chrome 83
Windows 8
Desktop
4 years ago
Test name Executions per second
undefined 3320935.0 Ops/sec
typeof 9461454.0 Ops/sec
in 9461987.0 Ops/sec
hasOwnProperty 8580689.0 Ops/sec
bool 9452019.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool